Multimedia; Add directshow backend

1 files changed, 126 insertions, 0 deletions

diff --git a/src/plugins/mediaservices/directshow/mediaplayer/directshowioreader.h b/src/plugins/mediaservices/directshow/mediaplayer/directshowioreader.h
new file mode 100644
index 0000000..8cbc2f1
--- /dev/null
+++ b/src/plugins/mediaservices/directshow/mediaplayer/directshowioreader.h
@@ -0,0 +1,126 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DIRECTSHOWIOREADER_H
+#define DIRECTSHOWIOREADER_H
+
+#include <QtCore/qmutex.h>
+#include <QtCore/qobject.h>
+#include <QtCore/qwaitcondition.h>
+
+#include <dshow.h>
+
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QIODevice;
+
+class DirectShowEventLoop;
+class DirectShowIOSource;
+class DirectShowSampleRequest;
+
+class DirectShowIOReader : public QObject, public IAsyncReader
+{
+    Q_OBJECT
+public:
+    DirectShowIOReader(QIODevice *device, DirectShowIOSource *source, DirectShowEventLoop *loop);
+    ~DirectShowIOReader();
+
+    // IUnknown
+    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject);
+    ULONG STDMETHODCALLTYPE AddRef();
+    ULONG STDMETHODCALLTYPE Release();
+
+    // IAsyncReader
+    HRESULT STDMETHODCALLTYPE RequestAllocator(
+            IMemAllocator *pPreferred, ALLOCATOR_PROPERTIES *pProps, IMemAllocator **ppActual);
+
+    HRESULT STDMETHODCALLTYPE Request(IMediaSample *pSample, DWORD_PTR dwUser);
+
+    HRESULT STDMETHODCALLTYPE WaitForNext(
+            DWORD dwTimeout, IMediaSample **ppSample, DWORD_PTR *pdwUser);
+
+    HRESULT STDMETHODCALLTYPE SyncReadAligned(IMediaSample *pSample);
+
+    HRESULT STDMETHODCALLTYPE SyncRead(LONGLONG llPosition, LONG lLength, BYTE *pBuffer);
+
+    HRESULT STDMETHODCALLTYPE Length(LONGLONG *pTotal, LONGLONG *pAvailable);
+
+    HRESULT STDMETHODCALLTYPE BeginFlush();
+    HRESULT STDMETHODCALLTYPE EndFlush();
+
+protected:
+    void customEvent(QEvent *event);
+
+private Q_SLOTS:
+    void readyRead();
+
+private:
+    HRESULT blockingRead(LONGLONG position, LONG length, BYTE *buffer, qint64 *bytesRead);
+    bool nonBlockingRead(
+            LONGLONG position, LONG length, BYTE *buffer, qint64 *bytesRead, HRESULT *result);
+    void flushRequests();
+
+    DirectShowIOSource *m_source;
+    QIODevice *m_device;
+    DirectShowEventLoop *m_loop;
+    DirectShowSampleRequest *m_pendingHead;
+    DirectShowSampleRequest *m_pendingTail;
+    DirectShowSampleRequest *m_readyHead;
+    DirectShowSampleRequest *m_readyTail;
+    LONGLONG m_synchronousPosition;
+    LONG m_synchronousLength;
+    qint64 m_synchronousBytesRead;
+    BYTE *m_synchronousBuffer;
+    HRESULT m_synchronousResult;
+    LONGLONG m_totalLength;
+    LONGLONG m_availableLength;
+    bool m_flushing;
+    QMutex m_mutex;
+    QWaitCondition m_wait;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+#endif